I did an engine swap yesterday and the car is hard to start. After long time of diagnosing found that the injectors causing this issue. Took them out and cleaned and tested them. They are not spraying at all. How do i unclog them? I tried tapping on them no luck.

 

the likelihood of all 4 injectors not working is slim to none. check grounds, main relay, and report back.

 

Thanks for the input. I was able to start the car but it sputters and misfire like crazy. Check the ignition all good. swapped ECU and main relay from my buddy's car same. Car has new spark plugs and wires. Fuel pump, Fuel Filter and adjustable FPR. If i increase the fuel pressure it runs better. I have pinched the fuel return line and it runs perfect!

 

Sounds like the FPR is not adjusted properly.

 

It is adjusted according to the manual. I replaced the stock fpr with the adjustable fpr thinking that it is not functioning properly.

 

Compare the fuel pressures with the stock versus adjustable FPR installed.

 

There are so many shitty adjustable FPRs on the market, and a new OEM unit is less than $50. Why would you even consider using a non-OEM unit, OP? Is there something else about your car you aren't telling us? If an adjustable FPR fixes a problem that a new OEM unit doesn't, then you have another issue you should be diagnosing, instead of a bandaid fix with an adjustable FPR.

 

The adjustable FPR I had from my Nissan Z32. I installed it to check if the FPR is functioning on my EJ6. I think am having a fuel injector problem because when i took them out and tested them they are not spraying. I put a hose on the injector (see attached) and added fuel and applied power to the injector and it just clicks. It is not spraying the fuel.

 

If you just put the other end of the hose in a funnel or something with fuel, it wont spray because it has no pressure. Just leak out.

One way to do the method you tried, have the injectors hooked to the fueal rail and connect one by one electircally and crank the entine to see if it sprays.

 

Your testing method is flawed, and easily remedied. Put fuel in an automotive syringe and press against the plunger while quickly tapping the terminals. If you've got a fuel injector connector it's better to cut it apart than try and press a couple wires against those little terminals.

 

I was refering to the cars actual harness plugs(hence having injectors in fuel rail), not bare wire. Even then with bare wire, the right female connection would work for your method.
The fuel syringe would work too, but if he does not have one, my testing method will work.

 

I meant OP, not you. Your way would work just fine. I just see if the cylinder smells flooded with the distributor plug disconnected.

I would just wrap the end of the injector harness up to a 9 volt battery and tap the other wire while pressing on the syringe. This is what i learned as the procedure to clean injectors. Fill the syringe with Techron or Lucas injector cleaner.

 

Thanks guys. I will try the fuel syringe method and i will get back with the results.

 

This^ does not fit with an injector problem. Measure the fuel pressure.

What year EJ6?

 

33 psi (h22 swap)

2000 sedan

 

Under what conditions?

 

33 psi at idle, 42 with vaccum hose disconnected and pinched

 

resistor box?

 

resistor box installed and tested. all injectors 2.5ohms

 

What computer are you using ??? What size injectors do you believe you have ???

If the car seems to respond to dramatically increasing the fuel pressure inside the rail, you either have much smaller fuel injectors than you believe you have... or the ECU is not programmed for this application... be it the wrong OE computer or the wrong mapping on a replacement computer.

Also, use a small flat head screw driver and gently but effectively push on the pintle pin at the bottom of the injector to make sure it is not seized. You will feel the movement and hear a slight click when doing this.

 

Although it's a tried and true method of using the resistor boxes with those peak and hold injectors... I prefer the simplicity of the OB2 saturated 290cc injectors that come on the H22A4 that plug right into the stock harness...

For my car I had the fuel pressure set to like 40psi at idle with the vacuum hose attached per the Prelude Service Manual.

 

ECU is p13. tried chipped p28 with h22 basemap same. The injectors are Keihin and on the side stamped 2HB2 i googled it but no luck with the results. I'll try the screwdriver method

 

Just want to let you know guys that i got it sorted. I took the injectors to have them cleaned and flow tested. 3 injectors 240cc and 1 injector 345cc !!